subject: exchange

You gotta be kiddin’
May 28, 2005, 5:14 pm
Filed under: Cool Reading

Once in a while those guys from Microsoft publish some really nice KB articles. Just read this one and have a good laughs (txs Sérgio):

Q257875: STM file association changes when you install a third-party MP3 player

(By the way, who in his perfect sense would install an MP3 player on an Exchange Server?)

There are many, many others. You can find a nice collection at this link:

Funny Microsoft Q Articles

The most powerful servers in the World!
May 21, 2005, 5:38 pm
Filed under: 1312

Which is the best server to run Exchange Server? It’s not an easy question, but if the deciding factor is performance, then MAPI Messaging Benchmark 3 (MMB3) is the right measure for you.
MMB3 is the benchmarking standard for measuring the performance and scalability of computers running Exchange Server 2003 and basically it measures the maximum number of concurrent users a server can handle.

Hardware vendors are constantly trying to set a new MMB3 record, that’s why the leader changes over time. Microsoft publishes regularly the results on the page Performance Benchmarks for Computers Running Exchange Server 2003.

There are 2 main categories: single server and cluster. There a couple of rules that the servers must meet, namely they must run during a 4-hour steady state period. Results should be interpreted as a benchmark for messaging throughput and should not be confused with deployment recommendations.
Presently this is the current list:

Single server
MMB3 Server Processor type
10,520 Hewlett-Packard ProLiant DL580 G3 Xeon MP
10,200 Hewlett-Packard ProLiant DL585 Opteron
9,500 FSC Primergy BX660 Xeon
9,300 IBM eServer xSeries 365 Xeon


MMB3 Server Processor type
20,400 Dell PowerEdge 1855 Xeon
18,600 Dell PowerEdge 1850 Xeon
18,500 FSC Primergy BX620 S2 Xeon
15,000 Dell PowerEdge 1750 Xeon

Microsoft registers email patent
May 19, 2005, 6:31 pm
Filed under: News

Macworld Daily News published an article about Microsoft, who has registered US patent number 6,895,426 on Tuesday.

The present invention is directed at a system and process for allowing a user to treat email addresses as objects. This allows easy manipulation of the email addresses, such as allowing them to be added to a contact list, copied to the computer’s clipboard, or double-clicked to open the related contact information for that email address sender. Email addresses are treated as objects in the message preview pane and full message windows of both incoming and outgoing email messages. A small icon is added to the text of each address.

Will we see this technology in Office 12?

TechNet Magazine, Spring 2005
May 18, 2005, 4:45 pm
Filed under: Cool Reading

TechNet MagazineThe new issue of TechNet Magazine, Spring 2005, has finally come out.

All the articles are available online, so you may want to spend some time reading them. There are a couple of articles about Exchange, here are the links:

Be The Master Of Your Domain Rename With Exchange, by Steve Schiemann;
Migration, Active Directory, And You: A Guide for Exchange Admins, by the great guru Nino Bilic.


Microsoft Security Advisory (842851)
May 16, 2005, 11:38 am
Filed under: 1312
Springfield tar pit

Microsoft released a security advisory that focus on the SMTP tar pit feature included with Windows Server 2003 Service Pack 1. This feature was previously available as a PSS update.

SMTP tar pitting is the practice of artificially delaying server responses for certain SMTP communication patterns and it’s used to help fighting spam attacks, such as Directory Harvest Attack (DHA). In a DHA, an attacker unleashes a program that guesses all the possible e-mail addresses within a domain and attempts to send messages to those addresses. Normally the SMTP server will respond with a “550 User unknown” message to the non-existing addresses, so after a succeeded DHA the spammer will know the valid addresses.

250 2.1.0 <>….Sender OK
550 5.1.1 User unknown

A brute force attack such as DHA with 4 characters can be completed in about 20 minutes. By introducing a 5 sec. delay it will now take months.

Related links:

Detailed instructions for using Inter-Org DL Migration Script
May 11, 2005, 4:08 pm
Filed under: 1312,1456

For those of you interested in more information regarding the Inter-Org Migration script that I developed, I decided to compile detailed step-by-step instructions to run the script:

  1. Install and configure ADC. This article might be useful: XGEN: How to Configure a Two-Way Recipient Connection Agreement for Exchange Server 5.5 User;
  2. Synchronize Exchange 5.5 Directory with AD. It’s fundamental that you import all the users first;
  3. Using Exchange 5.5 Administrator console, increase LDAP query results limit (9999, for example). The Maximum number of search results returned setting is located on the Search tab in the LDAP (Directory) Site Defaults Properties dialog box at the site level, and in the LDAP (Directory) Settings Properties dialog box at the server level;
  4. Modify the variables inside the script, in order to match your environment;
  5. Run the script on the Exchange 2003 server;
  6. If an error occurs before the end of the import process, delete all the DL’s already migrated before running the script again.

Related post:

Thank you Hélder for the latest feedback ;-)

Update for Outlook 2003 Junk Email Filter (KB894384)
May 11, 2005, 10:25 am
Filed under: Updates

Microsoft has just released the latest update for Outlook 2003 Junk E-Mail filter. You can get it here.

This optional update provides the Junk E-mail Filter in Microsoft Office Outlook 2003 with a more current definition of the e-mail messages that should be considered junk e-mail messages. This update was released in May 2005.”

You can also read the correspondent KB article:

Description of the Outlook 2003 Junk E-mail Filter update: May, 2005


You have to take your hat off!
May 4, 2005, 5:19 pm
Filed under: 1312

Spammers are getting smarter. You have to admire the ingenuity behind the spam message I recently received. This (bad) guy is sending messages with words made by tiny characters.

 nqpfmxou                                       x             mtscwaji              mr              
 d     exo                                      q             f      fi             di              
 o            dcxsc   wj fos  vvkn   nh mnvq    e    rsvi     a       g    belps  rbomwe  lbea    iv
 bmwjewj    gi    vh  kfe  evaj vxf  hekc qcx   x  wrl  jra   w  sa njl  qsj   sc   al  mpx  mnd  pc
     sfctl        uh  hy    w     x  dv     fg  r  cu    jbs  dytaamwx         ug   mh  lk    dnm   
         kr cmtif  b  vx    g     k  qn     sq  y  wqlhka     n      cv  lboakx c   gg  ux yme      
yd       lw f      g  qx    x     i  uq     oa  w  gy     y   b       f  y      d   nh  ea     q    
 mlijldrwv  ekaqcakwv qd    yt   vo  iisyqghh  sw   caytvlm  by      wn  fkxkcycsy  pgv  rpbqqlm  qa
   shlnk     lbqb   n fv    v     a  qi jkn     e    jspp     l       hg   omx   h    d    hpg     e
 x       a                                                 on         s         d                   
 vv     lr                                               lfyvcd      oi        fbbbhncqki           
  hu   pv                                               jn x  dy   gqav               hv            
   lb lw     koymvc   kw epap    egcise  dn     mp      yg t         ju              sk             
    clp     uq    ef  vnd   xc  wk    cn  pwv  ni        cbxqw       og             nb              
   odcf       toyhwa  ig    uc    lnswni   xf fy           wglec     tk            ef               
  tfg og    lfw    b  pk    va  bam    k    fpy        tn  vw  q     bd            wt               
 lb    nlj  e     ta  gl    fl  w     px   ho ob       fr  y   o     rp           br                
mq      peg cxtrtlqti uc    uv  ninnmbthhvfs   hhe      buocjior     tn    rbu    ht                
                                                           qm               p                       
nb        aa           rh  qo                                  cgsl        b           gmd          
eg       il            js  nb                                 tvxnesc     ut         jmkyfbb        
 kx      kx            y                                     ph yl bb   ysub         ku    xo       
 sq     yk   afuixlt   m   ui xhx    do  bqnlui qgpgv         hyl         pi         q     pe       
  rg    pr   x     vg  r   p   c     ka  ig   wxs   lr         ffnvn      rb         fj   wbr       
  iwh  gm     jhnurkg  c   t   t     u   b    rx    yl          qw nn     ua          vkobc p       
   os se     xp    ei  j   b   r     p   g    vx    tj      mv  os  ts    br               am       
    f oo    ol     uw  n   t   uc    b   q    ne    hw       j  n   s     dw         ku   kad       
    nrx      eelehdeid qt  om  cqhsrbxd  vy   db    mp       pricyisj     oi    taj   hyyngp        
    hhtmj    gi            ek  vl                  wqcqa     fdoh           ayjj                    
  dlu   flp  hc            tv  wo                tq  j gc   cj  axb        bxo dwe                  
 pp       tp               tg                    yo  h  w  bh     s       rf    yl                  
 e           eu  fcggusvt  jw  jo  bmenmwp        nu a           nj       bs     t                  
 i           mm        vl  fd  gm jq     f          krko       kig        omb  htp                  
 o           og   drhbypv  sp  eg  spnyif            b ve    ofr            grkr w                  
 vi       hp wc  ye     f  aj  kc       ro      uc   v  rc  qn             a     y                  
  pjt   oja  po  rv    bw  dr  om qxm    vn      iu  x fx  ch      l  xj   emf vbq                  
   pfsjrga   md  lxhhed of uh  po  hxftghc        layyau   juwqonnij  gi    xvvm                    
rx       xaqenv                                            dctedy     tcwwf         mdysotem        
 g       xx                                               sr  f vx   ob   wm        gq              
 mf     wo   y     pyq       se      e  hn   dllq         pr  s  l  ma     w        fy              
  qx    ip   pu  untnahg   lfavjneg  irrfw cwevuosr        dnbr           yc       wsfjlhja         
  it   qp    w         ff iy     lu  r           bp          odat      esee        ps     rx        
   gp  ah    l   wjedj w  bu     wh  g     yhykfqct           x  g    he                  ci        
   yt xb     f  ui     q  dg     ym  a     a     ve      bpi  f  lw  p             rv     mc        
    rfxv     q  ig    xrw  fou cxph  bf    u    dis       ns  l tt  vn yxqrfv  nl   craowby         
    fft      b   qefjx  hw  apun qb  eg     kieeu of        wdwao   vgmvswtfx  rf     hte           
                           b     h                            e                                     


I wonder how the bayesian filters in which the majority of the anti-spam tools are based on will deal with this new type of menace.